target/firmware/l1ctl: both chan_nr and link_id are not set for L1CTL_DATA_CONF

Due to a bit complicated implementation of event handling in the firmware, it's hard to pass all required parameters to an event handler. So, both chan_nr and link_id are not being set (always 0x00) for L1CTL messages of type L1CTL_DATA_CONF. At the same time link_id is checked by the higher layers at 'src/host/layer23/src/common//rx_ph_data_conf()':